Choosing the right propeller doesn't have to end in frustration. The updated Turning Point Propellers online selection tool, Prop Wizard 4.0, removes guesswork with a massive database and precise calculations. Its scalable display is simple to use on smart phones, tablets or computers, promising to become every boater's go-to propeller resource.

Many marine dealers embed Turning Point's prop selection tool into their websites to simplify customer purchases, though anyone can use it at www.tpprops.com. Prop Wizard 4.0 guides boat owners to the ideal propeller using a new database amplified with over 350,000 boats spanning 35 model years and 7,000 engines.

Prop Wizard 4.0 takes into account such performance-affecting variables as the boat's average load and altitude of operation—from Lake Tahoe to Biscayne Bay, and all the waters in between. In seconds, its weight calculator can factor in anchors, trolling or kicker motors, batteries, coolers, livewell capacity, and fishing and ski gear. This fine tuning helps dial in the optimal propeller with pinpoint accuracy. New Back buttons in the program facilitate user changes to information, and turning propeller icons indicate calculations are processing. (904-900-7739/www.tpprops.com)